A corruption sting at the notorious Rikers Island prison in New York shines a light on the widespread human rights violations in the U.S. prison population

Two guards and six inmates at New York's troubled Rikers Island jail complex are among 17 people charged with running extensive smuggling networks to provide prisoners with weapons and drugs, authorities said Thursday.

The defendants were arrested over the course of several months and face a total of 84 charges in four separate indictments.

Rikers Island, one of the country's biggest jail facilities with approximately 10,000 inmates, has long been plagued by what authorities describe as pervasive violence and smuggling.

Crime within the U.S. penal system is common, and Rikers is a troubling example of the extent to which officials engage in unlawful acts. A Reuters analysis previously found that more than 50 guards at Rikers have faced criminal charges since 2012 for assault, falsifying reports and smuggling contraband, as city and federal investigators have accelerated efforts to combat misconduct among correction employees.

criticisms of the U.S.' for-profit prisons and the disproportionate rates of incarceration for minorities have called into question the myriad human rights violations surrounding the U.S. justice system. The topics of prison labor, solitarity confinement, the death penalty and more have all become hot-button topics.

"Today's announcement provides a unique window into contraband smuggling at Rikers,"Mark Peters, the commissioner of the Department of Investigation, which is working with the Bronx district attorney's office on the case said at a press conference.

Authorities say Kevin McKoy, a 31-year-old guard, was at the center of the conspiracy, receiving at least $10,000 in bribes to smuggle scalpels, synthetic marijuana and the opioid drug suboxone into Rikers.

Inmates would contact family members of friends outside Rikers and instruct them to pay bribes to McCoy, who would then pick up the items and bring them into Rikers to deliver to the inmates.

McKoy and Mohammed Sufian, another guard accused of smuggling contraband for inmates, were arraigned on the charges on Thursday in the Bronx. Other defendants include inmates and their associates outside Rikers who helped arrange the bribes.

"These alleged schemes fed the climate of danger and fear that makes Rikers Island notorious for brutality," said Bronx District Attorney Darcel Clark.